Frame
"Framing is the technique of drawing attention to the subject of your image by blocking other parts of the image with something in the scene. Frames for photographs come in all shapes and sizes and can include shooting through overhanging branches, shooting through windows, using tunnels, arches or doorways – you can even use people (for example shooting over shoulders or between heads) etc. Your frame doesn’t need to go completely around the edges of your image – they might just be on one or two edges of your shot."